Montcalm County, MI radon potential

Montcalm County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Rank it against the rest of the country and Montcalm County lands in the 57th percentile for radon potential.

How Montcalm County compares

Montcalm County, Michigan is home to about 69,314 people across 705.329 square miles. Population density there runs about 98 people per square mile. Within its own EPA zone, Montcalm County is bigger by population than 74% of the counties that share it. Geologically, Montcalm County is grouped into EPA Region 5 alongside 523 other counties that share its rock and soil setting.

What this actually means for a house in Montcalm County

Montcalm County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Nothing about a Zone 2 label lowers the case for testing in Montcalm County — EPA recommends it in every zone, moderate included.

Next steps for a home in Montcalm County

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Michigan's state radon program

For Montcalm County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Montcalm County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Montcalm County's figures come from

Montcalm County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.